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I have often thought that there should be a law that all portable devices have a hard off switch or battery disconnect. Both issues can be fixed by the clever tinkerer. For the NVNA, add a battery

On Tue, Jan 7, 2020 at 02:44 PM, Ron Bussiere wrote: " I made a simple tool to install the board side connectors, but also doubt they will survive very long. .."

Hi Brian, Unfortunate but a 100 pF will NOT remain a 100 pF C independent of frequency. And in fact the C value will increase with an increase in frequency. In your case with the values you provided,

Brian, How much different are your results if you clip to the capacitor 0.25" away from the cap body vs 0.5" away from the cap body? The inductance of the leads in series with the capacitor will form

On the nanoVNA(H) the spec on the IP5303 says its standby is less than 100 uA, assuming it's 'Smart load detector' detects the unit has been turned off and puts the chip in standby. For a 450 mAH

For flying wires and alligator clips to work, everything must be in the *exact same position* as when the calibration was done. I use a couple of BNC female connectors mounted on a piece of double

Hi Gary, Great questions. I have no idea what the answers are. But Erik’s and John’s replies seem reasonable. Perhaps Dr. Kirby might know. Best regards, Jeff

I have also been looking to answer how accurate should the NanoVNA be at HF. Most components I want to measure are wire ended so my test jig is a 60cm RG316 with SMA on each end cut in half. Each cut

Hi Herb. I made a simple tool to install the board side connectors, but also doubt they will survive very long. My first thought was to solder them onto the board, but that would probably cause the

Interesting, I'd never seen that parameter on data sheets before. That'll give me something new to study ;-) 73 de Andy

Mel, thanks for the great help with this project (and to Gabriel-san, of course). You should change your username on groups.io to Vignette Tsukinose April. Sorry about the inside joke, at least you

On Tue, Jan 7, 2020 at 01:47 PM, Phil Royce wrote: " looks like 23 more cables to order and fix them permanently on to sma patch panel, I don't want to take on and off these, knowing in the past these

Gary, just a guess (I'm not a VNA designer) but it might be because it's easier to design and characterize an "absolute" (open or short) with nominally infinite impedance than something that needs to

https://www.ebay.com/itm/5pcs-25cm-1-13-U-FL-IPEX-IPX-Mini-PCI-to-SMA-Female-RF-Coax-Pigtail-cable/223529095134?_trkparms=aid%3D555021%26algo%3DPL.SIMRVI%26ao%3D1%26asc%3D20191105165729%26meid%3D0eea1

Could it be because these are most easy to manufacture? A short and an open? -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files: /g/nanovna-users/files Erik,

Found a better price here for bulk. I'm use to lab prices so these are pretty cheap but not going to use constantly just for demo and test theories.

looks like 23 more cables to order and fix them permanently on to sma patch panel, I don't want to take on and off these, knowing in the past these connectors are not continuous use parts. Thanks for

Hi folks, This is more a generic VNA question, but thought i'd ask. I've seen a trick to "eliminate" the coax by calibrating via the OSL on the far end of the coax, rather than having OSL connected

30 mating cycles ?? That gets you through the Demo Board only twice !! Where can one get extra cables, I think I may need them if I am to use the Demo Board to show off what the NanoVNA can do. 73,

Hi again Jeff; I believe I now sufficiently understand the technical aspects of the discussions in this thread to forego the wizardry behind the pursuit of high accuracy. it appears sufficiently